Rotational bands in <math xmlns="http://www.w3.org/1998/Math/MathML"><mmultiscripts><mi>Md</mi><mprescripts></mprescripts><none></none><mn>249</mn></mmultiscripts></math>

C. J. Appleton; R. M. Clark; C. Morse; D. Seweryniak; M. Armstrong; J. Bequet; C. Burns; C. M. Campbell; A. T. Chemey; P. Chowdhury; H. L. Crawford; M. Cromaz; P. Fallon; G. Garcia-Jiménez; R. D. Herzberg; Y. Hrabar; T. Huang; V. Karayonchev; F. G. Kondev; A. Korichi; T. Lauritsen; P. McGovern; C. Müller-Gatermann; C. Porzio; D. H. Potterveld; W. Reviol; E. Rice; D. Rudolph; L. G. Sarmiento; M. Siciliano; R. S. Sidhu; S. G. Wahid

doi:10.1103/c5zn-xn9j

Rotational bands in ${}^{249}{Md}$

C. J. Appleton ^1,*, R. M. Clark ¹, C. Morse ², D. Seweryniak ³, M. Armstrong ¹, J. Bequet ⁴, C. Burns⁵, C. M. Campbell ¹, A. T. Chemey ⁶ et al.

P. Chowdhury⁵, H. L. Crawford ¹, M. Cromaz ¹, P. Fallon ¹, G. Garcia-Jiménez ¹, R. D. Herzberg ⁷, Y. Hrabar ⁸, T. Huang^3,9, V. Karayonchev ³, F. G. Kondev ³, A. Korichi^3,10, T. Lauritsen ³, P. McGovern ^3,11, C. Müller-Gatermann ³, C. Porzio ^1,†, D. H. Potterveld ³, W. Reviol ³, E. Rice ¹, D. Rudolph ⁸, L. G. Sarmiento ⁸, M. Siciliano ³, R. S. Sidhu ¹², and S. G. Wahid⁵

¹Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
²National Nuclear Data Center, Brookhaven National Laboratory, Upton, New York 11973, USA
³Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
⁴IRFU/DPhN, CEA Paris-Saclay, F-91191 Gif sur Yvette, France
⁵Department of Physics, University of Massachusetts Lowell, Lowell, Massachusetts 01854, USA
⁶Oregon State University, Corvallis, Oregon 97331, USA
⁷University of Liverpool, Liverpool L69 7ZE, United, Kingdom
⁸Department of Physics, Lund University, 22100 Lund, Sweden
⁹State Key Laboratory of Heavy Ion Science and Technology, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
¹⁰CNRS/IN2P3, IJCLab, 91405 Orsay Campus, France
¹¹Department of Physics, University of Connecticut, Storrs, Connecticut 06269-3046, USA
¹²University of Surrey, Guildford GU2 7XH, United Kingdom

^*Contact author: CJAppleton@lbl.gov
^†Present address: CERN-ISOLDE, 1211 Geneva 23, Switzerland.

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Phys. Rev. C 112, 064314 – Published 10 December, 2025

DOI: https://doi.org/10.1103/c5zn-xn9j

Abstract

Rotational structures in ${}^{249}{Md}$ have been observed for the first time. One set of states forms a pair of strongly coupled bands with relatively strong E2 transitions and no identifiable M1 transitions between the two signature partners. Another set of states suggests a decoupled sequence of E2 transitions. These bands are assigned as based on the $7 / 2^{-} [514]$ and on the favored signature of the $1 / 2^{-} [521]$ Nilsson level, respectively. Based on previous decay studies, these levels are thought to be the ground state and first excited state of ${}^{249}{Md}$ , which also agrees with theoretical predictions.

Physical Review C

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Rotational bands in Md249

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Rotational bands in ${}^{249}{Md}$